EP 0737939 A3 19970305 - Image compression and method
Title (en)
Image compression and method
Title (de)
Verfahren und Gerät zur Bildkompression
Title (fr)
Procédé et système de compression d'image
Publication
Application
Priority
US 42046295 A 19950412
Abstract (en)
[origin: US5859927A] A method for compressing a first bit digital input representative of first pixel data into a second bit digital output representative of second pixel data, the method comprises the steps of defining a logarithmic function for converting the first bit digital input into the second bit digital output; replacing a portion of the logarithmic function with a polynomial function; and compressing the first bit digital input into the second bit digital output by utilizing the logarithmic and polynomial function.
IPC 1-7
IPC 8 full level
H04N 5/91 (2006.01); G06F 17/17 (2006.01); G06T 9/00 (2006.01); H04N 5/92 (2006.01); H04N 7/26 (2006.01)
CPC (source: EP US)
G06T 9/00 (2013.01 - EP US); G06T 9/001 (2013.01 - EP US)
Citation (search report)
- [A] EP 0066824 A2 19821215 - GEN ELECTRIC [US]
- [A] US 4926247 A 19900515 - NAGASAKI TATSUO [JP], et al
- [X] HOEFFLINGER B: "Efficient VLSI digital logarithmic codecs", ELECTRONICS LETTERS, 20 JUNE 1991, UK, vol. 27, no. 13, ISSN 0013-5194, pages 1132 - 1134, XP000238679
- [A] MUSAL H M JR: "Logarithmic compression of Rayleigh and Maxwell distributions", PROCEEDINGS OF THE IEEE, JULY 1969, USA, vol. 57, no. 7, ISSN 0018-9219, pages 1311 - 1313, XP000611007
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 5859927 A 19990112; EP 0737939 A2 19961016; EP 0737939 A3 19970305; JP H08294086 A 19961105; US 5708729 A 19980113
DOCDB simple family (application)
US 85661897 A 19970513; EP 96105320 A 19960403; JP 8167496 A 19960403; US 42046295 A 19950412